drivers/media/dvb/dvb-core/dvb_frontend.c

   1 /*
   2  * dvb_frontend.c: DVB frontend tuning interface/thread
   3  *
   4  *
   5  * Copyright (C) 1999-2001 Ralph  Metzler
   6  *                         Marcus Metzler
   7  *                         Holger Waechtler
   8  *                                    for convergence integrated media GmbH
   9  *
  10  * Copyright (C) 2004 Andrew de Quincey (tuning thread cleanup)
  11  *
  12  * This program is free software; you can redistribute it and/or
  13  * modify it under the terms of the GNU General Public License
  14  * as published by the Free Software Foundation; either version 2
  15  * of the License, or (at your option) any later version.
  16  *
  17  * This program is distributed in the hope that it will be useful,
  18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20  * GNU General Public License for more details.
  21  *
  22  * You should have received a copy of the GNU General Public License
  23  * along with this program; if not, write to the Free Software
  24  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  25  * Or, point your browser to http://www.gnu.org/copyleft/gpl.html
  26  */
  27
  28 #include <linux/string.h>
  29 #include <linux/kernel.h>
  30 #include <linux/sched.h>
  31 #include <linux/wait.h>
  32 #include <linux/slab.h>
  33 #include <linux/poll.h>
  34 #include <linux/semaphore.h>
  35 #include <linux/module.h>
  36 #include <linux/list.h>
  37 #include <linux/freezer.h>
  38 #include <linux/jiffies.h>
  39 #include <linux/kthread.h>
  40 #include <asm/processor.h>
  41
  42 #include "dvb_frontend.h"
  43 #include "dvbdev.h"
  44 #include <linux/dvb/version.h>
  45
  46 static int dvb_frontend_debug;
  47 static int dvb_shutdown_timeout;
  48 static int dvb_force_auto_inversion;
  49 static int dvb_override_tune_delay;
  50 static int dvb_powerdown_on_sleep = 1;
  51 static int dvb_mfe_wait_time = 5;
  52
  53 module_param_named(frontend_debug, dvb_frontend_debug, int, 0644);
  54 MODULE_PARM_DESC(frontend_debug, "Turn on/off frontend core debugging (default:off).");
  55 module_param(dvb_shutdown_timeout, int, 0644);
  56 MODULE_PARM_DESC(dvb_shutdown_timeout, "wait <shutdown_timeout> seconds after close() before suspending hardware");
  57 module_param(dvb_force_auto_inversion, int, 0644);
  58 MODULE_PARM_DESC(dvb_force_auto_inversion, "0: normal (default), 1: INVERSION_AUTO forced always");
  59 module_param(dvb_override_tune_delay, int, 0644);
  60 MODULE_PARM_DESC(dvb_override_tune_delay, "0: normal (default), >0 => delay in milliseconds to wait for lock after a tune attempt");
  61 module_param(dvb_powerdown_on_sleep, int, 0644);
  62 MODULE_PARM_DESC(dvb_powerdown_on_sleep, "0: do not power down, 1: turn LNB voltage off on sleep (default)");
  63 module_param(dvb_mfe_wait_time, int, 0644);
  64 MODULE_PARM_DESC(dvb_mfe_wait_time, "Wait up to <mfe_wait_time> seconds on open() for multi-frontend to become available (default:5 seconds)");
  65
  66 #define dprintk if (dvb_frontend_debug) printk
  67
  68 #define FESTATE_IDLE 1
  69 #define FESTATE_RETUNE 2
  70 #define FESTATE_TUNING_FAST 4
  71 #define FESTATE_TUNING_SLOW 8
  72 #define FESTATE_TUNED 16
  73 #define FESTATE_ZIGZAG_FAST 32
  74 #define FESTATE_ZIGZAG_SLOW 64
  75 #define FESTATE_DISEQC 128
  76 #define FESTATE_ERROR 256
  77 #define FESTATE_WAITFORLOCK (FESTATE_TUNING_FAST | FESTATE_TUNING_SLOW | FESTATE_ZIGZAG_FAST | FESTATE_ZIGZAG_SLOW | FESTATE_DISEQC)
  78 #define FESTATE_SEARCHING_FAST (FESTATE_TUNING_FAST | FESTATE_ZIGZAG_FAST)
  79 #define FESTATE_SEARCHING_SLOW (FESTATE_TUNING_SLOW | FESTATE_ZIGZAG_SLOW)
  80 #define FESTATE_LOSTLOCK (FESTATE_ZIGZAG_FAST | FESTATE_ZIGZAG_SLOW)
  81
  82 #define FE_ALGO_HW              1
  83 /*
  84  * FESTATE_IDLE. No tuning parameters have been supplied and the loop is idling.
  85  * FESTATE_RETUNE. Parameters have been supplied, but we have not yet performed the first tune.
  86  * FESTATE_TUNING_FAST. Tuning parameters have been supplied and fast zigzag scan is in progress.
  87  * FESTATE_TUNING_SLOW. Tuning parameters have been supplied. Fast zigzag failed, so we're trying again, but slower.
  88  * FESTATE_TUNED. The frontend has successfully locked on.
  89  * FESTATE_ZIGZAG_FAST. The lock has been lost, and a fast zigzag has been initiated to try and regain it.
  90  * FESTATE_ZIGZAG_SLOW. The lock has been lost. Fast zigzag has been failed, so we're trying again, but slower.
  91  * FESTATE_DISEQC. A DISEQC command has just been issued.
  92  * FESTATE_WAITFORLOCK. When we're waiting for a lock.
  93  * FESTATE_SEARCHING_FAST. When we're searching for a signal using a fast zigzag scan.
  94  * FESTATE_SEARCHING_SLOW. When we're searching for a signal using a slow zigzag scan.
  95  * FESTATE_LOSTLOCK. When the lock has been lost, and we're searching it again.
  96  */
  97
  98 #define DVB_FE_NO_EXIT  0
  99 #define DVB_FE_NORMAL_EXIT      1
 100 #define DVB_FE_DEVICE_REMOVED   2
 101
 102 static DEFINE_MUTEX(frontend_mutex);
 103
 104 struct dvb_frontend_private {
 105
 106         /* thread/frontend values */
 107         struct dvb_device *dvbdev;
 108         struct dvb_frontend_parameters parameters;
 109         struct dvb_fe_events events;
 110         struct semaphore sem;
 111         struct list_head list_head;
 112         wait_queue_head_t wait_queue;
 113         struct task_struct *thread;
 114         unsigned long release_jiffies;
 115         unsigned int exit;
 116         unsigned int wakeup;
 117         fe_status_t status;
 118         unsigned long tune_mode_flags;
 119         unsigned int delay;
 120         unsigned int reinitialise;
 121         int tone;
 122         int voltage;
 123
 124         /* swzigzag values */
 125         unsigned int state;
 126         unsigned int bending;
 127         int lnb_drift;
 128         unsigned int inversion;
 129         unsigned int auto_step;
 130         unsigned int auto_sub_step;
 131         unsigned int started_auto_step;
 132         unsigned int min_delay;
 133         unsigned int max_drift;
 134         unsigned int step_size;
 135         int quality;
 136         unsigned int check_wrapped;
 137         enum dvbfe_search algo_status;
 138 };
 139
 140 static void dvb_frontend_wakeup(struct dvb_frontend *fe);
 141
 142 static void dvb_frontend_add_event(struct dvb_frontend *fe, fe_status_t status)
 143 {
 144         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 145         struct dvb_fe_events *events = &fepriv->events;
 146         struct dvb_frontend_event *e;
 147         int wp;
 148
 149         dprintk ("%s\n", __func__);
 150
 151         if (mutex_lock_interruptible (&events->mtx))
 152                 return;
 153
 154         wp = (events->eventw + 1) % MAX_EVENT;
 155
 156         if (wp == events->eventr) {
 157                 events->overflow = 1;
 158                 events->eventr = (events->eventr + 1) % MAX_EVENT;
 159         }
 160
 161         e = &events->events[events->eventw];
 162
 163         memcpy (&e->parameters, &fepriv->parameters,
 164                 sizeof (struct dvb_frontend_parameters));
 165
 166         if (status & FE_HAS_LOCK)
 167                 if (fe->ops.get_frontend)
 168                         fe->ops.get_frontend(fe, &e->parameters);
 169
 170         events->eventw = wp;
 171
 172         mutex_unlock(&events->mtx);
 173
 174         e->status = status;
 175
 176         wake_up_interruptible (&events->wait_queue);
 177 }
 178
 179 static int dvb_frontend_get_event(struct dvb_frontend *fe,
 180                             struct dvb_frontend_event *event, int flags)
 181 {
 182         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 183         struct dvb_fe_events *events = &fepriv->events;
 184
 185         dprintk ("%s\n", __func__);
 186
 187         if (events->overflow) {
 188                 events->overflow = 0;
 189                 return -EOVERFLOW;
 190         }
 191
 192         if (events->eventw == events->eventr) {
 193                 int ret;
 194
 195                 if (flags & O_NONBLOCK)
 196                         return -EWOULDBLOCK;
 197
 198                 up(&fepriv->sem);
 199
 200                 ret = wait_event_interruptible (events->wait_queue,
 201                                                 events->eventw != events->eventr);
 202
 203                 if (down_interruptible (&fepriv->sem))
 204                         return -ERESTARTSYS;
 205
 206                 if (ret < 0)
 207                         return ret;
 208         }
 209
 210         if (mutex_lock_interruptible (&events->mtx))
 211                 return -ERESTARTSYS;
 212
 213         memcpy (event, &events->events[events->eventr],
 214                 sizeof(struct dvb_frontend_event));
 215
 216         events->eventr = (events->eventr + 1) % MAX_EVENT;
 217
 218         mutex_unlock(&events->mtx);
 219
 220         return 0;
 221 }
 222
 223 static void dvb_frontend_init(struct dvb_frontend *fe)
 224 {
 225         dprintk ("DVB: initialising adapter %i frontend %i (%s)...\n",
 226                  fe->dvb->num,
 227                  fe->id,
 228                  fe->ops.info.name);
 229
 230         if (fe->ops.init)
 231                 fe->ops.init(fe);
 232         if (fe->ops.tuner_ops.init) {
 233                 if (fe->ops.i2c_gate_ctrl)
 234                         fe->ops.i2c_gate_ctrl(fe, 1);
 235                 fe->ops.tuner_ops.init(fe);
 236                 if (fe->ops.i2c_gate_ctrl)
 237                         fe->ops.i2c_gate_ctrl(fe, 0);
 238         }
 239 }
 240
 241 void dvb_frontend_reinitialise(struct dvb_frontend *fe)
 242 {
 243         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 244
 245         fepriv->reinitialise = 1;
 246         dvb_frontend_wakeup(fe);
 247 }
 248 EXPORT_SYMBOL(dvb_frontend_reinitialise);
 249
 250 static void dvb_frontend_swzigzag_update_delay(struct dvb_frontend_private *fepriv, int locked)
 251 {
 252         int q2;
 253
 254         dprintk ("%s\n", __func__);
 255
 256         if (locked)
 257                 (fepriv->quality) = (fepriv->quality * 220 + 36*256) / 256;
 258         else
 259                 (fepriv->quality) = (fepriv->quality * 220 + 0) / 256;
 260
 261         q2 = fepriv->quality - 128;
 262         q2 *= q2;
 263
 264         fepriv->delay = fepriv->min_delay + q2 * HZ / (128*128);
 265 }
 266
 267 /**
 268  * Performs automatic twiddling of frontend parameters.
 269  *
 270  * @param fe The frontend concerned.
 271  * @param check_wrapped Checks if an iteration has completed. DO NOT SET ON THE FIRST ATTEMPT
 272  * @returns Number of complete iterations that have been performed.
 273  */
 274 static int dvb_frontend_swzigzag_autotune(struct dvb_frontend *fe, int check_wrapped)
 275 {
 276         int autoinversion;
 277         int ready = 0;
 278         int fe_set_err = 0;
 279         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 280         int original_inversion = fepriv->parameters.inversion;
 281         u32 original_frequency = fepriv->parameters.frequency;
 282
 283         /* are we using autoinversion? */
 284         autoinversion = ((!(fe->ops.info.caps & FE_CAN_INVERSION_AUTO)) &&
 285                          (fepriv->parameters.inversion == INVERSION_AUTO));
 286
 287         /* setup parameters correctly */
 288         while(!ready) {
 289                 /* calculate the lnb_drift */
 290                 fepriv->lnb_drift = fepriv->auto_step * fepriv->step_size;
 291
 292                 /* wrap the auto_step if we've exceeded the maximum drift */
 293                 if (fepriv->lnb_drift > fepriv->max_drift) {
 294                         fepriv->auto_step = 0;
 295                         fepriv->auto_sub_step = 0;
 296                         fepriv->lnb_drift = 0;
 297                 }
 298
 299                 /* perform inversion and +/- zigzag */
 300                 switch(fepriv->auto_sub_step) {
 301                 case 0:
 302                         /* try with the current inversion and current drift setting */
 303                         ready = 1;
 304                         break;
 305
 306                 case 1:
 307                         if (!autoinversion) break;
 308
 309                         fepriv->inversion = (fepriv->inversion == INVERSION_OFF) ? INVERSION_ON : INVERSION_OFF;
 310                         ready = 1;
 311                         break;
 312
 313                 case 2:
 314                         if (fepriv->lnb_drift == 0) break;
 315
 316                         fepriv->lnb_drift = -fepriv->lnb_drift;
 317                         ready = 1;
 318                         break;
 319
 320                 case 3:
 321                         if (fepriv->lnb_drift == 0) break;
 322                         if (!autoinversion) break;
 323
 324                         fepriv->inversion = (fepriv->inversion == INVERSION_OFF) ? INVERSION_ON : INVERSION_OFF;
 325                         fepriv->lnb_drift = -fepriv->lnb_drift;
 326                         ready = 1;
 327                         break;
 328
 329                 default:
 330                         fepriv->auto_step++;
 331                         fepriv->auto_sub_step = -1; /* it'll be incremented to 0 in a moment */
 332                         break;
 333                 }
 334
 335                 if (!ready) fepriv->auto_sub_step++;
 336         }
 337
 338         /* if this attempt would hit where we started, indicate a complete
 339          * iteration has occurred */
 340         if ((fepriv->auto_step == fepriv->started_auto_step) &&
 341             (fepriv->auto_sub_step == 0) && check_wrapped) {
 342                 return 1;
 343         }
 344
 345         dprintk("%s: drift:%i inversion:%i auto_step:%i "
 346                 "auto_sub_step:%i started_auto_step:%i\n",
 347                 __func__, fepriv->lnb_drift, fepriv->inversion,
 348                 fepriv->auto_step, fepriv->auto_sub_step, fepriv->started_auto_step);
 349
 350         /* set the frontend itself */
 351         fepriv->parameters.frequency += fepriv->lnb_drift;
 352         if (autoinversion)
 353                 fepriv->parameters.inversion = fepriv->inversion;
 354         if (fe->ops.set_frontend)
 355                 fe_set_err = fe->ops.set_frontend(fe, &fepriv->parameters);
 356         if (fe_set_err < 0) {
 357                 fepriv->state = FESTATE_ERROR;
 358                 return fe_set_err;
 359         }
 360
 361         fepriv->parameters.frequency = original_frequency;
 362         fepriv->parameters.inversion = original_inversion;
 363
 364         fepriv->auto_sub_step++;
 365         return 0;
 366 }
 367
 368 static void dvb_frontend_swzigzag(struct dvb_frontend *fe)
 369 {
 370         fe_status_t s = 0;
 371         int retval = 0;
 372         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 373
 374         /* if we've got no parameters, just keep idling */
 375         if (fepriv->state & FESTATE_IDLE) {
 376                 fepriv->delay = 3*HZ;
 377                 fepriv->quality = 0;
 378                 return;
 379         }
 380
 381         /* in SCAN mode, we just set the frontend when asked and leave it alone */
 382         if (fepriv->tune_mode_flags & FE_TUNE_MODE_ONESHOT) {
 383                 if (fepriv->state & FESTATE_RETUNE) {
 384                         if (fe->ops.set_frontend)
 385                                 retval = fe->ops.set_frontend(fe,
 386                                                         &fepriv->parameters);
 387                         if (retval < 0)
 388                                 fepriv->state = FESTATE_ERROR;
 389                         else
 390                                 fepriv->state = FESTATE_TUNED;
 391                 }
 392                 fepriv->delay = 3*HZ;
 393                 fepriv->quality = 0;
 394                 return;
 395         }
 396
 397         /* get the frontend status */
 398         if (fepriv->state & FESTATE_RETUNE) {
 399                 s = 0;
 400         } else {
 401                 if (fe->ops.read_status)
 402                         fe->ops.read_status(fe, &s);
 403                 if (s != fepriv->status) {
 404                         dvb_frontend_add_event(fe, s);
 405                         fepriv->status = s;
 406                 }
 407         }
 408
 409         /* if we're not tuned, and we have a lock, move to the TUNED state */
 410         if ((fepriv->state & FESTATE_WAITFORLOCK) && (s & FE_HAS_LOCK)) {
 411                 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
 412                 fepriv->state = FESTATE_TUNED;
 413
 414                 /* if we're tuned, then we have determined the correct inversion */
 415                 if ((!(fe->ops.info.caps & FE_CAN_INVERSION_AUTO)) &&
 416                     (fepriv->parameters.inversion == INVERSION_AUTO)) {
 417                         fepriv->parameters.inversion = fepriv->inversion;
 418                 }
 419                 return;
 420         }
 421
 422         /* if we are tuned already, check we're still locked */
 423         if (fepriv->state & FESTATE_TUNED) {
 424                 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
 425
 426                 /* we're tuned, and the lock is still good... */
 427                 if (s & FE_HAS_LOCK) {
 428                         return;
 429                 } else { /* if we _WERE_ tuned, but now don't have a lock */
 430                         fepriv->state = FESTATE_ZIGZAG_FAST;
 431                         fepriv->started_auto_step = fepriv->auto_step;
 432                         fepriv->check_wrapped = 0;
 433                 }
 434         }
 435
 436         /* don't actually do anything if we're in the LOSTLOCK state,
 437          * the frontend is set to FE_CAN_RECOVER, and the max_drift is 0 */
 438         if ((fepriv->state & FESTATE_LOSTLOCK) &&
 439             (fe->ops.info.caps & FE_CAN_RECOVER) && (fepriv->max_drift == 0)) {
 440                 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
 441                 return;
 442         }
 443
 444         /* don't do anything if we're in the DISEQC state, since this
 445          * might be someone with a motorized dish controlled by DISEQC.
 446          * If its actually a re-tune, there will be a SET_FRONTEND soon enough. */
 447         if (fepriv->state & FESTATE_DISEQC) {
 448                 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
 449                 return;
 450         }
 451
 452         /* if we're in the RETUNE state, set everything up for a brand
 453          * new scan, keeping the current inversion setting, as the next
 454          * tune is _very_ likely to require the same */
 455         if (fepriv->state & FESTATE_RETUNE) {
 456                 fepriv->lnb_drift = 0;
 457                 fepriv->auto_step = 0;
 458                 fepriv->auto_sub_step = 0;
 459                 fepriv->started_auto_step = 0;
 460                 fepriv->check_wrapped = 0;
 461         }
 462
 463         /* fast zigzag. */
 464         if ((fepriv->state & FESTATE_SEARCHING_FAST) || (fepriv->state & FESTATE_RETUNE)) {
 465                 fepriv->delay = fepriv->min_delay;
 466
 467                 /* perform a tune */
 468                 retval = dvb_frontend_swzigzag_autotune(fe,
 469                                                         fepriv->check_wrapped);
 470                 if (retval < 0) {
 471                         return;
 472                 } else if (retval) {
 473                         /* OK, if we've run out of trials at the fast speed.
 474                          * Drop back to slow for the _next_ attempt */
 475                         fepriv->state = FESTATE_SEARCHING_SLOW;
 476                         fepriv->started_auto_step = fepriv->auto_step;
 477                         return;
 478                 }
 479                 fepriv->check_wrapped = 1;
 480
 481                 /* if we've just retuned, enter the ZIGZAG_FAST state.
 482                  * This ensures we cannot return from an
 483                  * FE_SET_FRONTEND ioctl before the first frontend tune
 484                  * occurs */
 485                 if (fepriv->state & FESTATE_RETUNE) {
 486                         fepriv->state = FESTATE_TUNING_FAST;
 487                 }
 488         }
 489
 490         /* slow zigzag */
 491         if (fepriv->state & FESTATE_SEARCHING_SLOW) {
 492                 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
 493
 494                 /* Note: don't bother checking for wrapping; we stay in this
 495                  * state until we get a lock */
 496                 dvb_frontend_swzigzag_autotune(fe, 0);
 497         }
 498 }
 499
 500 static int dvb_frontend_is_exiting(struct dvb_frontend *fe)
 501 {
 502         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 503
 504         if (fepriv->exit != DVB_FE_NO_EXIT)
 505                 return 1;
 506
 507         if (fepriv->dvbdev->writers == 1)
 508                 if (time_after(jiffies, fepriv->release_jiffies +
 509                                   dvb_shutdown_timeout * HZ))
 510                         return 1;
 511
 512         return 0;
 513 }
 514
 515 static int dvb_frontend_should_wakeup(struct dvb_frontend *fe)
 516 {
 517         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 518
 519         if (fepriv->wakeup) {
 520                 fepriv->wakeup = 0;
 521                 return 1;
 522         }
 523         return dvb_frontend_is_exiting(fe);
 524 }
 525
 526 static void dvb_frontend_wakeup(struct dvb_frontend *fe)
 527 {
 528         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 529
 530         fepriv->wakeup = 1;
 531         wake_up_interruptible(&fepriv->wait_queue);
 532 }
 533
 534 static int dvb_frontend_thread(void *data)
 535 {
 536         struct dvb_frontend *fe = data;
 537         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 538         unsigned long timeout;
 539         fe_status_t s;
 540         enum dvbfe_algo algo;
 541
 542         struct dvb_frontend_parameters *params;
 543
 544         dprintk("%s\n", __func__);
 545
 546         fepriv->check_wrapped = 0;
 547         fepriv->quality = 0;
 548         fepriv->delay = 3*HZ;
 549         fepriv->status = 0;
 550         fepriv->wakeup = 0;
 551         fepriv->reinitialise = 0;
 552
 553         dvb_frontend_init(fe);
 554
 555         set_freezable();
 556         while (1) {
 557                 up(&fepriv->sem);           /* is locked when we enter the thread... */
 558 restart:
 559                 timeout = wait_event_interruptible_timeout(fepriv->wait_queue,
 560                         dvb_frontend_should_wakeup(fe) || kthread_should_stop()
 561                                 || freezing(current),
 562                         fepriv->delay);
 563
 564                 if (kthread_should_stop() || dvb_frontend_is_exiting(fe)) {
 565                         /* got signal or quitting */
 566                         fepriv->exit = DVB_FE_NORMAL_EXIT;
 567                         break;
 568                 }
 569
 570                 if (try_to_freeze())
 571                         goto restart;
 572
 573                 if (down_interruptible(&fepriv->sem))
 574                         break;
 575
 576                 if (fepriv->reinitialise) {
 577                         dvb_frontend_init(fe);
 578                         if (fepriv->tone != -1) {
 579                                 fe->ops.set_tone(fe, fepriv->tone);
 580                         }
 581                         if (fepriv->voltage != -1) {
 582                                 fe->ops.set_voltage(fe, fepriv->voltage);
 583                         }
 584                         fepriv->reinitialise = 0;
 585                 }
 586
 587                 /* do an iteration of the tuning loop */
 588                 if (fe->ops.get_frontend_algo) {
 589                         algo = fe->ops.get_frontend_algo(fe);
 590                         switch (algo) {
 591                         case DVBFE_ALGO_HW:
 592                                 dprintk("%s: Frontend ALGO = DVBFE_ALGO_HW\n", __func__);
 593                                 params = NULL; /* have we been asked to RETUNE ? */
 594
 595                                 if (fepriv->state & FESTATE_RETUNE) {
 596                                         dprintk("%s: Retune requested, FESTATE_RETUNE\n", __func__);
 597                                         params = &fepriv->parameters;
 598                                         fepriv->state = FESTATE_TUNED;
 599                                 }
 600
 601                                 if (fe->ops.tune)
 602                                         fe->ops.tune(fe, params, fepriv->tune_mode_flags, &fepriv->delay, &s);
 603
 604                                 if (s != fepriv->status && !(fepriv->tune_mode_flags & FE_TUNE_MODE_ONESHOT)) {
 605                                         dprintk("%s: state changed, adding current state\n", __func__);
 606                                         dvb_frontend_add_event(fe, s);
 607                                         fepriv->status = s;
 608                                 }
 609                                 break;
 610                         case DVBFE_ALGO_SW:
 611                                 dprintk("%s: Frontend ALGO = DVBFE_ALGO_SW\n", __func__);
 612                                 dvb_frontend_swzigzag(fe);
 613                                 break;
 614                         case DVBFE_ALGO_CUSTOM:
 615                                 params = NULL; /* have we been asked to RETUNE ?        */
 616                                 dprintk("%s: Frontend ALGO = DVBFE_ALGO_CUSTOM, state=%d\n", __func__, fepriv->state);
 617                                 if (fepriv->state & FESTATE_RETUNE) {
 618                                         dprintk("%s: Retune requested, FESTAT_RETUNE\n", __func__);
 619                                         params = &fepriv->parameters;
 620                                         fepriv->state = FESTATE_TUNED;
 621                                 }
 622                                 /* Case where we are going to search for a carrier
 623                                  * User asked us to retune again for some reason, possibly
 624                                  * requesting a search with a new set of parameters
 625                                  */
 626                                 if (fepriv->algo_status & DVBFE_ALGO_SEARCH_AGAIN) {
 627                                         if (fe->ops.search) {
 628                                                 fepriv->algo_status = fe->ops.search(fe, &fepriv->parameters);
 629                                                 /* We did do a search as was requested, the flags are
 630                                                  * now unset as well and has the flags wrt to search.
 631                                                  */
 632                                         } else {
 633                                                 fepriv->algo_status &= ~DVBFE_ALGO_SEARCH_AGAIN;
 634                                         }
 635                                 }
 636                                 /* Track the carrier if the search was successful */
 637                                 if (fepriv->algo_status == DVBFE_ALGO_SEARCH_SUCCESS) {
 638                                         if (fe->ops.track)
 639                                                 fe->ops.track(fe, &fepriv->parameters);
 640                                 } else {
 641                                         fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN;
 642                                         fepriv->delay = HZ / 2;
 643                                 }
 644                                 fe->ops.read_status(fe, &s);
 645                                 if (s != fepriv->status) {
 646                                         dvb_frontend_add_event(fe, s); /* update event list */
 647                                         fepriv->status = s;
 648                                         if (!(s & FE_HAS_LOCK)) {
 649                                                 fepriv->delay = HZ / 10;
 650                                                 fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN;
 651                                         } else {
 652                                                 fepriv->delay = 60 * HZ;
 653                                         }
 654                                 }
 655                                 break;
 656                         default:
 657                                 dprintk("%s: UNDEFINED ALGO !\n", __func__);
 658                                 break;
 659                         }
 660                 } else {
 661                         dvb_frontend_swzigzag(fe);
 662                 }
 663         }
 664
 665         if (dvb_powerdown_on_sleep) {
 666                 if (fe->ops.set_voltage)
 667                         fe->ops.set_voltage(fe, SEC_VOLTAGE_OFF);
 668                 if (fe->ops.tuner_ops.sleep) {
 669                         if (fe->ops.i2c_gate_ctrl)
 670                                 fe->ops.i2c_gate_ctrl(fe, 1);
 671                         fe->ops.tuner_ops.sleep(fe);
 672                         if (fe->ops.i2c_gate_ctrl)
 673                                 fe->ops.i2c_gate_ctrl(fe, 0);
 674                 }
 675                 if (fe->ops.sleep)
 676                         fe->ops.sleep(fe);
 677         }
 678
 679         fepriv->thread = NULL;
 680         if (kthread_should_stop())
 681                 fepriv->exit = DVB_FE_DEVICE_REMOVED;
 682         else
 683                 fepriv->exit = DVB_FE_NO_EXIT;
 684         mb();
 685
 686         dvb_frontend_wakeup(fe);
 687         return 0;
 688 }
 689
 690 static void dvb_frontend_stop(struct dvb_frontend *fe)
 691 {
 692         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 693
 694         dprintk ("%s\n", __func__);
 695
 696         fepriv->exit = DVB_FE_NORMAL_EXIT;
 697         mb();
 698
 699         if (!fepriv->thread)
 700                 return;
 701
 702         kthread_stop(fepriv->thread);
 703
 704         sema_init(&fepriv->sem, 1);
 705         fepriv->state = FESTATE_IDLE;
 706
 707         /* paranoia check in case a signal arrived */
 708         if (fepriv->thread)
 709                 printk("dvb_frontend_stop: warning: thread %p won't exit\n",
 710                                 fepriv->thread);
 711 }
 712
 713 s32 timeval_usec_diff(struct timeval lasttime, struct timeval curtime)
 714 {
 715         return ((curtime.tv_usec < lasttime.tv_usec) ?
 716                 1000000 - lasttime.tv_usec + curtime.tv_usec :
 717                 curtime.tv_usec - lasttime.tv_usec);
 718 }
 719 EXPORT_SYMBOL(timeval_usec_diff);
 720
 721 static inline void timeval_usec_add(struct timeval *curtime, u32 add_usec)
 722 {
 723         curtime->tv_usec += add_usec;
 724         if (curtime->tv_usec >= 1000000) {
 725                 curtime->tv_usec -= 1000000;
 726                 curtime->tv_sec++;
 727         }
 728 }
 729
 730 /*
 731  * Sleep until gettimeofday() > waketime + add_usec
 732  * This needs to be as precise as possible, but as the delay is
 733  * usually between 2ms and 32ms, it is done using a scheduled msleep
 734  * followed by usleep (normally a busy-wait loop) for the remainder
 735  */
 736 void dvb_frontend_sleep_until(struct timeval *waketime, u32 add_usec)
 737 {
 738         struct timeval lasttime;
 739         s32 delta, newdelta;
 740
 741         timeval_usec_add(waketime, add_usec);
 742
 743         do_gettimeofday(&lasttime);
 744         delta = timeval_usec_diff(lasttime, *waketime);
 745         if (delta > 2500) {
 746                 msleep((delta - 1500) / 1000);
 747                 do_gettimeofday(&lasttime);
 748                 newdelta = timeval_usec_diff(lasttime, *waketime);
 749                 delta = (newdelta > delta) ? 0 : newdelta;
 750         }
 751         if (delta > 0)
 752                 udelay(delta);
 753 }
 754 EXPORT_SYMBOL(dvb_frontend_sleep_until);
 755
 756 static int dvb_frontend_start(struct dvb_frontend *fe)
 757 {
 758         int ret;
 759         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 760         struct task_struct *fe_thread;
 761
 762         dprintk ("%s\n", __func__);
 763
 764         if (fepriv->thread) {
 765                 if (fepriv->exit == DVB_FE_NO_EXIT)
 766                         return 0;
 767                 else
 768                         dvb_frontend_stop (fe);
 769         }
 770
 771         if (signal_pending(current))
 772                 return -EINTR;
 773         if (down_interruptible (&fepriv->sem))
 774                 return -EINTR;
 775
 776         fepriv->state = FESTATE_IDLE;
 777         fepriv->exit = DVB_FE_NO_EXIT;
 778         fepriv->thread = NULL;
 779         mb();
 780
 781         fe_thread = kthread_run(dvb_frontend_thread, fe,
 782                 "kdvb-ad-%i-fe-%i", fe->dvb->num,fe->id);
 783         if (IS_ERR(fe_thread)) {
 784                 ret = PTR_ERR(fe_thread);
 785                 printk("dvb_frontend_start: failed to start kthread (%d)\n", ret);
 786                 up(&fepriv->sem);
 787                 return ret;
 788         }
 789         fepriv->thread = fe_thread;
 790         return 0;
 791 }
 792
 793 static void dvb_frontend_get_frequency_limits(struct dvb_frontend *fe,
 794                                         u32 *freq_min, u32 *freq_max)
 795 {
 796         *freq_min = max(fe->ops.info.frequency_min, fe->ops.tuner_ops.info.frequency_min);
 797
 798         if (fe->ops.info.frequency_max == 0)
 799                 *freq_max = fe->ops.tuner_ops.info.frequency_max;
 800         else if (fe->ops.tuner_ops.info.frequency_max == 0)
 801                 *freq_max = fe->ops.info.frequency_max;
 802         else
 803                 *freq_max = min(fe->ops.info.frequency_max, fe->ops.tuner_ops.info.frequency_max);
 804
 805         if (*freq_min == 0 || *freq_max == 0)
 806                 printk(KERN_WARNING "DVB: adapter %i frontend %u frequency limits undefined - fix the driver\n",
 807                        fe->dvb->num,fe->id);
 808 }
 809
 810 static int dvb_frontend_check_parameters(struct dvb_frontend *fe,
 811                                 struct dvb_frontend_parameters *parms)
 812 {
 813         u32 freq_min;
 814         u32 freq_max;
 815
 816         /* range check: frequency */
 817         dvb_frontend_get_frequency_limits(fe, &freq_min, &freq_max);
 818         if ((freq_min && parms->frequency < freq_min) ||
 819             (freq_max && parms->frequency > freq_max)) {
 820                 printk(KERN_WARNING "DVB: adapter %i frontend %i frequency %u out of range (%u..%u)\n",
 821                        fe->dvb->num, fe->id, parms->frequency, freq_min, freq_max);
 822                 return -EINVAL;
 823         }
 824
 825         /* range check: symbol rate */
 826         if (fe->ops.info.type == FE_QPSK) {
 827                 if ((fe->ops.info.symbol_rate_min &&
 828                      parms->u.qpsk.symbol_rate < fe->ops.info.symbol_rate_min) ||
 829                     (fe->ops.info.symbol_rate_max &&
 830                      parms->u.qpsk.symbol_rate > fe->ops.info.symbol_rate_max)) {
 831                         printk(KERN_WARNING "DVB: adapter %i frontend %i symbol rate %u out of range (%u..%u)\n",
 832                                fe->dvb->num, fe->id, parms->u.qpsk.symbol_rate,
 833                                fe->ops.info.symbol_rate_min, fe->ops.info.symbol_rate_max);
 834                         return -EINVAL;
 835                 }
 836
 837         } else if (fe->ops.info.type == FE_QAM) {
 838                 if ((fe->ops.info.symbol_rate_min &&
 839                      parms->u.qam.symbol_rate < fe->ops.info.symbol_rate_min) ||
 840                     (fe->ops.info.symbol_rate_max &&
 841                      parms->u.qam.symbol_rate > fe->ops.info.symbol_rate_max)) {
 842                         printk(KERN_WARNING "DVB: adapter %i frontend %i symbol rate %u out of range (%u..%u)\n",
 843                                fe->dvb->num, fe->id, parms->u.qam.symbol_rate,
 844                                fe->ops.info.symbol_rate_min, fe->ops.info.symbol_rate_max);
 845                         return -EINVAL;
 846                 }
 847         }
 848
 849         /* check for supported modulation */
 850         if (fe->ops.info.type == FE_QAM &&
 851             (parms->u.qam.modulation > QAM_AUTO ||
 852              !((1 << (parms->u.qam.modulation + 10)) & fe->ops.info.caps))) {
 853                 printk(KERN_WARNING "DVB: adapter %i frontend %i modulation %u not supported\n",
 854                        fe->dvb->num, fe->id, parms->u.qam.modulation);
 855                         return -EINVAL;
 856         }
 857
 858         return 0;
 859 }
 860
 861 static int dvb_frontend_clear_cache(struct dvb_frontend *fe)
 862 {
 863         int i;
 864
 865         memset(&(fe->dtv_property_cache), 0,
 866                         sizeof(struct dtv_frontend_properties));
 867
 868         fe->dtv_property_cache.state = DTV_CLEAR;
 869         fe->dtv_property_cache.delivery_system = SYS_UNDEFINED;
 870         fe->dtv_property_cache.inversion = INVERSION_AUTO;
 871         fe->dtv_property_cache.fec_inner = FEC_AUTO;
 872         fe->dtv_property_cache.transmission_mode = TRANSMISSION_MODE_AUTO;
 873         fe->dtv_property_cache.bandwidth_hz = BANDWIDTH_AUTO;
 874         fe->dtv_property_cache.guard_interval = GUARD_INTERVAL_AUTO;
 875         fe->dtv_property_cache.hierarchy = HIERARCHY_AUTO;
 876         fe->dtv_property_cache.symbol_rate = QAM_AUTO;
 877         fe->dtv_property_cache.code_rate_HP = FEC_AUTO;
 878         fe->dtv_property_cache.code_rate_LP = FEC_AUTO;
 879
 880         fe->dtv_property_cache.isdbt_partial_reception = -1;
 881         fe->dtv_property_cache.isdbt_sb_mode = -1;
 882         fe->dtv_property_cache.isdbt_sb_subchannel = -1;
 883         fe->dtv_property_cache.isdbt_sb_segment_idx = -1;
 884         fe->dtv_property_cache.isdbt_sb_segment_count = -1;
 885         fe->dtv_property_cache.isdbt_layer_enabled = 0x7;
 886         for (i = 0; i < 3; i++) {
 887                 fe->dtv_property_cache.layer[i].fec = FEC_AUTO;
 888                 fe->dtv_property_cache.layer[i].modulation = QAM_AUTO;
 889                 fe->dtv_property_cache.layer[i].interleaving = -1;
 890                 fe->dtv_property_cache.layer[i].segment_count = -1;
 891         }
 892
 893         return 0;
 894 }
 895
 896 #define _DTV_CMD(n, s, b) \
 897 [n] = { \
 898         .name = #n, \
 899         .cmd  = n, \
 900         .set  = s,\
 901         .buffer = b \
 902 }
 903
 904 static struct dtv_cmds_h dtv_cmds[] = {
 905         _DTV_CMD(DTV_TUNE, 1, 0),
 906         _DTV_CMD(DTV_CLEAR, 1, 0),
 907
 908         /* Set */
 909         _DTV_CMD(DTV_FREQUENCY, 1, 0),
 910         _DTV_CMD(DTV_BANDWIDTH_HZ, 1, 0),
 911         _DTV_CMD(DTV_MODULATION, 1, 0),
 912         _DTV_CMD(DTV_INVERSION, 1, 0),
 913         _DTV_CMD(DTV_DISEQC_MASTER, 1, 1),
 914         _DTV_CMD(DTV_SYMBOL_RATE, 1, 0),
 915         _DTV_CMD(DTV_INNER_FEC, 1, 0),
 916         _DTV_CMD(DTV_VOLTAGE, 1, 0),
 917         _DTV_CMD(DTV_TONE, 1, 0),
 918         _DTV_CMD(DTV_PILOT, 1, 0),
 919         _DTV_CMD(DTV_ROLLOFF, 1, 0),
 920         _DTV_CMD(DTV_DELIVERY_SYSTEM, 1, 0),
 921         _DTV_CMD(DTV_HIERARCHY, 1, 0),
 922         _DTV_CMD(DTV_CODE_RATE_HP, 1, 0),
 923         _DTV_CMD(DTV_CODE_RATE_LP, 1, 0),
 924         _DTV_CMD(DTV_GUARD_INTERVAL, 1, 0),
 925         _DTV_CMD(DTV_TRANSMISSION_MODE, 1, 0),
 926
 927         _DTV_CMD(DTV_ISDBT_PARTIAL_RECEPTION, 1, 0),
 928         _DTV_CMD(DTV_ISDBT_SOUND_BROADCASTING, 1, 0),
 929         _DTV_CMD(DTV_ISDBT_SB_SUBCHANNEL_ID, 1, 0),
 930         _DTV_CMD(DTV_ISDBT_SB_SEGMENT_IDX, 1, 0),
 931         _DTV_CMD(DTV_ISDBT_SB_SEGMENT_COUNT, 1, 0),
 932         _DTV_CMD(DTV_ISDBT_LAYER_ENABLED, 1, 0),
 933         _DTV_CMD(DTV_ISDBT_LAYERA_FEC, 1, 0),
 934         _DTV_CMD(DTV_ISDBT_LAYERA_MODULATION, 1, 0),
 935         _DTV_CMD(DTV_ISDBT_LAYERA_SEGMENT_COUNT, 1, 0),
 936         _DTV_CMD(DTV_ISDBT_LAYERA_TIME_INTERLEAVING, 1, 0),
 937         _DTV_CMD(DTV_ISDBT_LAYERB_FEC, 1, 0),
 938         _DTV_CMD(DTV_ISDBT_LAYERB_MODULATION, 1, 0),
 939         _DTV_CMD(DTV_ISDBT_LAYERB_SEGMENT_COUNT, 1, 0),
 940         _DTV_CMD(DTV_ISDBT_LAYERB_TIME_INTERLEAVING, 1, 0),
 941         _DTV_CMD(DTV_ISDBT_LAYERC_FEC, 1, 0),
 942         _DTV_CMD(DTV_ISDBT_LAYERC_MODULATION, 1, 0),
 943         _DTV_CMD(DTV_ISDBT_LAYERC_SEGMENT_COUNT, 1, 0),
 944         _DTV_CMD(DTV_ISDBT_LAYERC_TIME_INTERLEAVING, 1, 0),
 945
 946         _DTV_CMD(DTV_ISDBT_PARTIAL_RECEPTION, 0, 0),
 947         _DTV_CMD(DTV_ISDBT_SOUND_BROADCASTING, 0, 0),
 948         _DTV_CMD(DTV_ISDBT_SB_SUBCHANNEL_ID, 0, 0),
 949         _DTV_CMD(DTV_ISDBT_SB_SEGMENT_IDX, 0, 0),
 950         _DTV_CMD(DTV_ISDBT_SB_SEGMENT_COUNT, 0, 0),
 951         _DTV_CMD(DTV_ISDBT_LAYER_ENABLED, 0, 0),
 952         _DTV_CMD(DTV_ISDBT_LAYERA_FEC, 0, 0),
 953         _DTV_CMD(DTV_ISDBT_LAYERA_MODULATION, 0, 0),
 954         _DTV_CMD(DTV_ISDBT_LAYERA_SEGMENT_COUNT, 0, 0),
 955         _DTV_CMD(DTV_ISDBT_LAYERA_TIME_INTERLEAVING, 0, 0),
 956         _DTV_CMD(DTV_ISDBT_LAYERB_FEC, 0, 0),
 957         _DTV_CMD(DTV_ISDBT_LAYERB_MODULATION, 0, 0),
 958         _DTV_CMD(DTV_ISDBT_LAYERB_SEGMENT_COUNT, 0, 0),
 959         _DTV_CMD(DTV_ISDBT_LAYERB_TIME_INTERLEAVING, 0, 0),
 960         _DTV_CMD(DTV_ISDBT_LAYERC_FEC, 0, 0),
 961         _DTV_CMD(DTV_ISDBT_LAYERC_MODULATION, 0, 0),
 962         _DTV_CMD(DTV_ISDBT_LAYERC_SEGMENT_COUNT, 0, 0),
 963         _DTV_CMD(DTV_ISDBT_LAYERC_TIME_INTERLEAVING, 0, 0),
 964
 965         _DTV_CMD(DTV_ISDBS_TS_ID, 1, 0),
 966
 967         /* Get */
 968         _DTV_CMD(DTV_DISEQC_SLAVE_REPLY, 0, 1),
 969         _DTV_CMD(DTV_API_VERSION, 0, 0),
 970         _DTV_CMD(DTV_CODE_RATE_HP, 0, 0),
 971         _DTV_CMD(DTV_CODE_RATE_LP, 0, 0),
 972         _DTV_CMD(DTV_GUARD_INTERVAL, 0, 0),
 973         _DTV_CMD(DTV_TRANSMISSION_MODE, 0, 0),
 974         _DTV_CMD(DTV_HIERARCHY, 0, 0),
 975 };
 976
 977 static void dtv_property_dump(struct dtv_property *tvp)
 978 {
 979         int i;
 980
 981         if (tvp->cmd <= 0 || tvp->cmd > DTV_MAX_COMMAND) {
 982                 printk(KERN_WARNING "%s: tvp.cmd = 0x%08x undefined\n",
 983                         __func__, tvp->cmd);
 984                 return;
 985         }
 986
 987         dprintk("%s() tvp.cmd    = 0x%08x (%s)\n"
 988                 ,__func__
 989                 ,tvp->cmd
 990                 ,dtv_cmds[ tvp->cmd ].name);
 991
 992         if(dtv_cmds[ tvp->cmd ].buffer) {
 993
 994                 dprintk("%s() tvp.u.buffer.len = 0x%02x\n"
 995                         ,__func__
 996                         ,tvp->u.buffer.len);
 997
 998                 for(i = 0; i < tvp->u.buffer.len; i++)
 999                         dprintk("%s() tvp.u.buffer.data[0x%02x] = 0x%02x\n"
1000                                 ,__func__
1001                                 ,i
1002                                 ,tvp->u.buffer.data[i]);
1003
1004         } else
1005                 dprintk("%s() tvp.u.data = 0x%08x\n", __func__, tvp->u.data);
1006 }
1007
1008 static int is_legacy_delivery_system(fe_delivery_system_t s)
1009 {
1010         if((s == SYS_UNDEFINED) || (s == SYS_DVBC_ANNEX_AC) ||
1011            (s == SYS_DVBC_ANNEX_B) || (s == SYS_DVBT) || (s == SYS_DVBS) ||
1012            (s == SYS_ATSC))
1013                 return 1;
1014
1015         return 0;
1016 }
1017
1018 /* Synchronise the legacy tuning parameters into the cache, so that demodulator
1019  * drivers can use a single set_frontend tuning function, regardless of whether
1020  * it's being used for the legacy or new API, reducing code and complexity.
1021  */
1022 static void dtv_property_cache_sync(struct dvb_frontend *fe,
1023                                     struct dvb_frontend_parameters *p)
1024 {
1025         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1026
1027         c->frequency = p->frequency;
1028         c->inversion = p->inversion;
1029
1030         switch (fe->ops.info.type) {
1031         case FE_QPSK:
1032                 c->modulation = QPSK;   /* implied for DVB-S in legacy API */
1033                 c->rolloff = ROLLOFF_35;/* implied for DVB-S */
1034                 c->symbol_rate = p->u.qpsk.symbol_rate;
1035                 c->fec_inner = p->u.qpsk.fec_inner;
1036                 c->delivery_system = SYS_DVBS;
1037                 break;
1038         case FE_QAM:
1039                 c->symbol_rate = p->u.qam.symbol_rate;
1040                 c->fec_inner = p->u.qam.fec_inner;
1041                 c->modulation = p->u.qam.modulation;
1042                 c->delivery_system = SYS_DVBC_ANNEX_AC;
1043                 break;
1044         case FE_OFDM:
1045                 if (p->u.ofdm.bandwidth == BANDWIDTH_6_MHZ)
1046                         c->bandwidth_hz = 6000000;
1047                 else if (p->u.ofdm.bandwidth == BANDWIDTH_7_MHZ)
1048                         c->bandwidth_hz = 7000000;
1049                 else if (p->u.ofdm.bandwidth == BANDWIDTH_8_MHZ)
1050                         c->bandwidth_hz = 8000000;
1051                 else
1052                         /* Including BANDWIDTH_AUTO */
1053                         c->bandwidth_hz = 0;
1054                 c->code_rate_HP = p->u.ofdm.code_rate_HP;
1055                 c->code_rate_LP = p->u.ofdm.code_rate_LP;
1056                 c->modulation = p->u.ofdm.constellation;
1057                 c->transmission_mode = p->u.ofdm.transmission_mode;
1058                 c->guard_interval = p->u.ofdm.guard_interval;
1059                 c->hierarchy = p->u.ofdm.hierarchy_information;
1060                 c->delivery_system = SYS_DVBT;
1061                 break;
1062         case FE_ATSC:
1063                 c->modulation = p->u.vsb.modulation;
1064                 if ((c->modulation == VSB_8) || (c->modulation == VSB_16))
1065                         c->delivery_system = SYS_ATSC;
1066                 else
1067                         c->delivery_system = SYS_DVBC_ANNEX_B;
1068                 break;
1069         }
1070 }
1071
1072 /* Ensure the cached values are set correctly in the frontend
1073  * legacy tuning structures, for the advanced tuning API.
1074  */
1075 static void dtv_property_legacy_params_sync(struct dvb_frontend *fe)
1076 {
1077         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1078         struct dvb_frontend_private *fepriv = fe->frontend_priv;
1079         struct dvb_frontend_parameters *p = &fepriv->parameters;
1080
1081         p->frequency = c->frequency;
1082         p->inversion = c->inversion;
1083
1084         switch (fe->ops.info.type) {
1085         case FE_QPSK:
1086                 dprintk("%s() Preparing QPSK req\n", __func__);
1087                 p->u.qpsk.symbol_rate = c->symbol_rate;
1088                 p->u.qpsk.fec_inner = c->fec_inner;
1089                 c->delivery_system = SYS_DVBS;
1090                 break;
1091         case FE_QAM:
1092                 dprintk("%s() Preparing QAM req\n", __func__);
1093                 p->u.qam.symbol_rate = c->symbol_rate;
1094                 p->u.qam.fec_inner = c->fec_inner;
1095                 p->u.qam.modulation = c->modulation;
1096                 c->delivery_system = SYS_DVBC_ANNEX_AC;
1097                 break;
1098         case FE_OFDM:
1099                 dprintk("%s() Preparing OFDM req\n", __func__);
1100                 if (c->bandwidth_hz == 6000000)
1101                         p->u.ofdm.bandwidth = BANDWIDTH_6_MHZ;
1102                 else if (c->bandwidth_hz == 7000000)
1103                         p->u.ofdm.bandwidth = BANDWIDTH_7_MHZ;
1104                 else if (c->bandwidth_hz == 8000000)
1105                         p->u.ofdm.bandwidth = BANDWIDTH_8_MHZ;
1106                 else
1107                         p->u.ofdm.bandwidth = BANDWIDTH_AUTO;
1108                 p->u.ofdm.code_rate_HP = c->code_rate_HP;
1109                 p->u.ofdm.code_rate_LP = c->code_rate_LP;
1110                 p->u.ofdm.constellation = c->modulation;
1111                 p->u.ofdm.transmission_mode = c->transmission_mode;
1112                 p->u.ofdm.guard_interval = c->guard_interval;
1113                 p->u.ofdm.hierarchy_information = c->hierarchy;
1114                 c->delivery_system = SYS_DVBT;
1115                 break;
1116         case FE_ATSC:
1117                 dprintk("%s() Preparing VSB req\n", __func__);
1118                 p->u.vsb.modulation = c->modulation;
1119                 if ((c->modulation == VSB_8) || (c->modulation == VSB_16))
1120                         c->delivery_system = SYS_ATSC;
1121                 else
1122                         c->delivery_system = SYS_DVBC_ANNEX_B;
1123                 break;
1124         }
1125 }
1126
1127 /* Ensure the cached values are set correctly in the frontend
1128  * legacy tuning structures, for the legacy tuning API.
1129  */
1130 static void dtv_property_adv_params_sync(struct dvb_frontend *fe)
1131 {
1132         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1133         struct dvb_frontend_private *fepriv = fe->frontend_priv;
1134         struct dvb_frontend_parameters *p = &fepriv->parameters;
1135
1136         p->frequency = c->frequency;
1137         p->inversion = c->inversion;
1138
1139         switch(c->modulation) {
1140         case PSK_8:
1141         case APSK_16:
1142         case APSK_32:
1143         case QPSK:
1144                 p->u.qpsk.symbol_rate = c->symbol_rate;
1145                 p->u.qpsk.fec_inner = c->fec_inner;
1146                 break;
1147         default:
1148                 break;
1149         }
1150
1151         if(c->delivery_system == SYS_ISDBT) {
1152                 /* Fake out a generic DVB-T request so we pass validation in the ioctl */
1153                 p->frequency = c->frequency;
1154                 p->inversion = c->inversion;
1155                 p->u.ofdm.constellation = QAM_AUTO;
1156                 p->u.ofdm.code_rate_HP = FEC_AUTO;
1157                 p->u.ofdm.code_rate_LP = FEC_AUTO;
1158                 p->u.ofdm.transmission_mode = TRANSMISSION_MODE_AUTO;
1159                 p->u.ofdm.guard_interval = GUARD_INTERVAL_AUTO;
1160                 p->u.ofdm.hierarchy_information = HIERARCHY_AUTO;
1161                 if (c->bandwidth_hz == 8000000)
1162                         p->u.ofdm.bandwidth = BANDWIDTH_8_MHZ;
1163                 else if (c->bandwidth_hz == 7000000)
1164                         p->u.ofdm.bandwidth = BANDWIDTH_7_MHZ;
1165                 else if (c->bandwidth_hz == 6000000)
1166                         p->u.ofdm.bandwidth = BANDWIDTH_6_MHZ;
1167                 else
1168                         p->u.ofdm.bandwidth = BANDWIDTH_AUTO;
1169         }
1170 }
1171
1172 static void dtv_property_cache_submit(struct dvb_frontend *fe)
1173 {
1174         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1175
1176         /* For legacy delivery systems we don't need the delivery_system to
1177          * be specified, but we populate the older structures from the cache
1178          * so we can call set_frontend on older drivers.
1179          */
1180         if(is_legacy_delivery_system(c->delivery_system)) {
1181
1182                 dprintk("%s() legacy, modulation = %d\n", __func__, c->modulation);
1183                 dtv_property_legacy_params_sync(fe);
1184
1185         } else {
1186                 dprintk("%s() adv, modulation = %d\n", __func__, c->modulation);
1187
1188                 /* For advanced delivery systems / modulation types ...
1189                  * we seed the lecacy dvb_frontend_parameters structure
1190                  * so that the sanity checking code later in the IOCTL processing
1191                  * can validate our basic frequency ranges, symbolrates, modulation
1192                  * etc.
1193                  */
1194                 dtv_property_adv_params_sync(fe);
1195         }
1196 }
1197
1198 static int dvb_frontend_ioctl_legacy(struct file *file,
1199                         unsigned int cmd, void *parg);
1200 static int dvb_frontend_ioctl_properties(struct file *file,
1201                         unsigned int cmd, void *parg);
1202
1203 static int dtv_property_process_get(struct dvb_frontend *fe,
1204                                     struct dtv_property *tvp,
1205                                     struct file *file)
1206 {
1207         int r = 0;
1208
1209         /* Allow the frontend to validate incoming properties */
1210         if (fe->ops.get_property)
1211                 r = fe->ops.get_property(fe, tvp);
1212
1213         if (r < 0)
1214                 return r;
1215
1216         switch(tvp->cmd) {
1217         case DTV_FREQUENCY:
1218                 tvp->u.data = fe->dtv_property_cache.frequency;
1219                 break;
1220         case DTV_MODULATION:
1221                 tvp->u.data = fe->dtv_property_cache.modulation;
1222                 break;
1223         case DTV_BANDWIDTH_HZ:
1224                 tvp->u.data = fe->dtv_property_cache.bandwidth_hz;
1225                 break;
1226         case DTV_INVERSION:
1227                 tvp->u.data = fe->dtv_property_cache.inversion;
1228                 break;
1229         case DTV_SYMBOL_RATE:
1230                 tvp->u.data = fe->dtv_property_cache.symbol_rate;
1231                 break;
1232         case DTV_INNER_FEC:
1233                 tvp->u.data = fe->dtv_property_cache.fec_inner;
1234                 break;
1235         case DTV_PILOT:
1236                 tvp->u.data = fe->dtv_property_cache.pilot;
1237                 break;
1238         case DTV_ROLLOFF:
1239                 tvp->u.data = fe->dtv_property_cache.rolloff;
1240                 break;
1241         case DTV_DELIVERY_SYSTEM:
1242                 tvp->u.data = fe->dtv_property_cache.delivery_system;
1243                 break;
1244         case DTV_VOLTAGE:
1245                 tvp->u.data = fe->dtv_property_cache.voltage;
1246                 break;
1247         case DTV_TONE:
1248                 tvp->u.data = fe->dtv_property_cache.sectone;
1249                 break;
1250         case DTV_API_VERSION:
1251                 tvp->u.data = (DVB_API_VERSION << 8) | DVB_API_VERSION_MINOR;
1252                 break;
1253         case DTV_CODE_RATE_HP:
1254                 tvp->u.data = fe->dtv_property_cache.code_rate_HP;
1255                 break;
1256         case DTV_CODE_RATE_LP:
1257                 tvp->u.data = fe->dtv_property_cache.code_rate_LP;
1258                 break;
1259         case DTV_GUARD_INTERVAL:
1260                 tvp->u.data = fe->dtv_property_cache.guard_interval;
1261                 break;
1262         case DTV_TRANSMISSION_MODE:
1263                 tvp->u.data = fe->dtv_property_cache.transmission_mode;
1264                 break;
1265         case DTV_HIERARCHY:
1266                 tvp->u.data = fe->dtv_property_cache.hierarchy;
1267                 break;
1268
1269         /* ISDB-T Support here */
1270         case DTV_ISDBT_PARTIAL_RECEPTION:
1271                 tvp->u.data = fe->dtv_property_cache.isdbt_partial_reception;
1272                 break;
1273         case DTV_ISDBT_SOUND_BROADCASTING:
1274                 tvp->u.data = fe->dtv_property_cache.isdbt_sb_mode;
1275                 break;
1276         case DTV_ISDBT_SB_SUBCHANNEL_ID:
1277                 tvp->u.data = fe->dtv_property_cache.isdbt_sb_subchannel;
1278                 break;
1279         case DTV_ISDBT_SB_SEGMENT_IDX:
1280                 tvp->u.data = fe->dtv_property_cache.isdbt_sb_segment_idx;
1281                 break;
1282         case DTV_ISDBT_SB_SEGMENT_COUNT:
1283                 tvp->u.data = fe->dtv_property_cache.isdbt_sb_segment_count;
1284                 break;
1285         case DTV_ISDBT_LAYER_ENABLED:
1286                 tvp->u.data = fe->dtv_property_cache.isdbt_layer_enabled;
1287                 break;
1288         case DTV_ISDBT_LAYERA_FEC:
1289                 tvp->u.data = fe->dtv_property_cache.layer[0].fec;
1290                 break;
1291         case DTV_ISDBT_LAYERA_MODULATION:
1292                 tvp->u.data = fe->dtv_property_cache.layer[0].modulation;
1293                 break;
1294         case DTV_ISDBT_LAYERA_SEGMENT_COUNT:
1295                 tvp->u.data = fe->dtv_property_cache.layer[0].segment_count;
1296                 break;
1297         case DTV_ISDBT_LAYERA_TIME_INTERLEAVING:
1298                 tvp->u.data = fe->dtv_property_cache.layer[0].interleaving;
1299                 break;
1300         case DTV_ISDBT_LAYERB_FEC:
1301                 tvp->u.data = fe->dtv_property_cache.layer[1].fec;
1302                 break;
1303         case DTV_ISDBT_LAYERB_MODULATION:
1304                 tvp->u.data = fe->dtv_property_cache.layer[1].modulation;
1305                 break;
1306         case DTV_ISDBT_LAYERB_SEGMENT_COUNT:
1307                 tvp->u.data = fe->dtv_property_cache.layer[1].segment_count;
1308                 break;
1309         case DTV_ISDBT_LAYERB_TIME_INTERLEAVING:
1310                 tvp->u.data = fe->dtv_property_cache.layer[1].interleaving;
1311                 break;
1312         case DTV_ISDBT_LAYERC_FEC:
1313                 tvp->u.data = fe->dtv_property_cache.layer[2].fec;
1314                 break;
1315         case DTV_ISDBT_LAYERC_MODULATION:
1316                 tvp->u.data = fe->dtv_property_cache.layer[2].modulation;
1317                 break;
1318         case DTV_ISDBT_LAYERC_SEGMENT_COUNT:
1319                 tvp->u.data = fe->dtv_property_cache.layer[2].segment_count;
1320                 break;
1321         case DTV_ISDBT_LAYERC_TIME_INTERLEAVING:
1322                 tvp->u.data = fe->dtv_property_cache.layer[2].interleaving;
1323                 break;
1324         case DTV_ISDBS_TS_ID:
1325                 tvp->u.data = fe->dtv_property_cache.isdbs_ts_id;
1326                 break;
1327         default:
1328                 r = -1;
1329         }
1330
1331         dtv_property_dump(tvp);
1332
1333         return r;
1334 }
1335
1336 static int dtv_property_process_set(struct dvb_frontend *fe,
1337                                     struct dtv_property *tvp,
1338                                     struct file *file)
1339 {
1340         int r = 0;
1341         struct dvb_frontend_private *fepriv = fe->frontend_priv;
1342         dtv_property_dump(tvp);
1343
1344         /* Allow the frontend to validate incoming properties */
1345         if (fe->ops.set_property)
1346                 r = fe->ops.set_property(fe, tvp);
1347
1348         if (r < 0)
1349                 return r;
1350
1351         switch(tvp->cmd) {
1352         case DTV_CLEAR:
1353                 /* Reset a cache of data specific to the frontend here. This does
1354                  * not effect hardware.
1355                  */
1356                 dvb_frontend_clear_cache(fe);
1357                 dprintk("%s() Flushing property cache\n", __func__);
1358                 break;
1359         case DTV_TUNE:
1360                 /* interpret the cache of data, build either a traditional frontend
1361                  * tunerequest so we can pass validation in the FE_SET_FRONTEND
1362                  * ioctl.
1363                  */
1364                 fe->dtv_property_cache.state = tvp->cmd;
1365                 dprintk("%s() Finalised property cache\n", __func__);
1366                 dtv_property_cache_submit(fe);
1367
1368                 r |= dvb_frontend_ioctl_legacy(file, FE_SET_FRONTEND,
1369                         &fepriv->parameters);
1370                 break;
1371         case DTV_FREQUENCY:
1372                 fe->dtv_property_cache.frequency = tvp->u.data;
1373                 break;
1374         case DTV_MODULATION:
1375                 fe->dtv_property_cache.modulation = tvp->u.data;
1376                 break;
1377         case DTV_BANDWIDTH_HZ:
1378                 fe->dtv_property_cache.bandwidth_hz = tvp->u.data;
1379                 break;
1380         case DTV_INVERSION:
1381                 fe->dtv_property_cache.inversion = tvp->u.data;
1382                 break;
1383         case DTV_SYMBOL_RATE:
1384                 fe->dtv_property_cache.symbol_rate = tvp->u.data;
1385                 break;
1386         case DTV_INNER_FEC:
1387                 fe->dtv_property_cache.fec_inner = tvp->u.data;
1388                 break;
1389         case DTV_PILOT:
1390                 fe->dtv_property_cache.pilot = tvp->u.data;
1391                 break;
1392         case DTV_ROLLOFF:
1393                 fe->dtv_property_cache.rolloff = tvp->u.data;
1394                 break;
1395         case DTV_DELIVERY_SYSTEM:
1396                 fe->dtv_property_cache.delivery_system = tvp->u.data;
1397                 break;
1398         case DTV_VOLTAGE:
1399                 fe->dtv_property_cache.voltage = tvp->u.data;
1400                 r = dvb_frontend_ioctl_legacy(file, FE_SET_VOLTAGE,
1401                         (void *)fe->dtv_property_cache.voltage);
1402                 break;
1403         case DTV_TONE:
1404                 fe->dtv_property_cache.sectone = tvp->u.data;
1405                 r = dvb_frontend_ioctl_legacy(file, FE_SET_TONE,
1406                         (void *)fe->dtv_property_cache.sectone);
1407                 break;
1408         case DTV_CODE_RATE_HP:
1409                 fe->dtv_property_cache.code_rate_HP = tvp->u.data;
1410                 break;
1411         case DTV_CODE_RATE_LP:
1412                 fe->dtv_property_cache.code_rate_LP = tvp->u.data;
1413                 break;
1414         case DTV_GUARD_INTERVAL:
1415                 fe->dtv_property_cache.guard_interval = tvp->u.data;
1416                 break;
1417         case DTV_TRANSMISSION_MODE:
1418                 fe->dtv_property_cache.transmission_mode = tvp->u.data;
1419                 break;
1420         case DTV_HIERARCHY:
1421                 fe->dtv_property_cache.hierarchy = tvp->u.data;
1422                 break;
1423
1424         /* ISDB-T Support here */
1425         case DTV_ISDBT_PARTIAL_RECEPTION:
1426                 fe->dtv_property_cache.isdbt_partial_reception = tvp->u.data;
1427                 break;
1428         case DTV_ISDBT_SOUND_BROADCASTING:
1429                 fe->dtv_property_cache.isdbt_sb_mode = tvp->u.data;
1430                 break;
1431         case DTV_ISDBT_SB_SUBCHANNEL_ID:
1432                 fe->dtv_property_cache.isdbt_sb_subchannel = tvp->u.data;
1433                 break;
1434         case DTV_ISDBT_SB_SEGMENT_IDX:
1435                 fe->dtv_property_cache.isdbt_sb_segment_idx = tvp->u.data;
1436                 break;
1437         case DTV_ISDBT_SB_SEGMENT_COUNT:
1438                 fe->dtv_property_cache.isdbt_sb_segment_count = tvp->u.data;
1439                 break;
1440         case DTV_ISDBT_LAYER_ENABLED:
1441                 fe->dtv_property_cache.isdbt_layer_enabled = tvp->u.data;
1442                 break;
1443         case DTV_ISDBT_LAYERA_FEC:
1444                 fe->dtv_property_cache.layer[0].fec = tvp->u.data;
1445                 break;
1446         case DTV_ISDBT_LAYERA_MODULATION:
1447                 fe->dtv_property_cache.layer[0].modulation = tvp->u.data;
1448                 break;
1449         case DTV_ISDBT_LAYERA_SEGMENT_COUNT:
1450                 fe->dtv_property_cache.layer[0].segment_count = tvp->u.data;
1451                 break;
1452         case DTV_ISDBT_LAYERA_TIME_INTERLEAVING:
1453                 fe->dtv_property_cache.layer[0].interleaving = tvp->u.data;
1454                 break;
1455         case DTV_ISDBT_LAYERB_FEC:
1456                 fe->dtv_property_cache.layer[1].fec = tvp->u.data;
1457                 break;
1458         case DTV_ISDBT_LAYERB_MODULATION:
1459                 fe->dtv_property_cache.layer[1].modulation = tvp->u.data;
1460                 break;
1461         case DTV_ISDBT_LAYERB_SEGMENT_COUNT:
1462                 fe->dtv_property_cache.layer[1].segment_count = tvp->u.data;
1463                 break;
1464         case DTV_ISDBT_LAYERB_TIME_INTERLEAVING:
1465                 fe->dtv_property_cache.layer[1].interleaving = tvp->u.data;
1466                 break;
1467         case DTV_ISDBT_LAYERC_FEC:
1468                 fe->dtv_property_cache.layer[2].fec = tvp->u.data;
1469                 break;
1470         case DTV_ISDBT_LAYERC_MODULATION:
1471                 fe->dtv_property_cache.layer[2].modulation = tvp->u.data;
1472                 break;
1473         case DTV_ISDBT_LAYERC_SEGMENT_COUNT:
1474                 fe->dtv_property_cache.layer[2].segment_count = tvp->u.data;
1475                 break;
1476         case DTV_ISDBT_LAYERC_TIME_INTERLEAVING:
1477                 fe->dtv_property_cache.layer[2].interleaving = tvp->u.data;
1478                 break;
1479         case DTV_ISDBS_TS_ID:
1480                 fe->dtv_property_cache.isdbs_ts_id = tvp->u.data;
1481                 break;
1482         default:
1483                 r = -1;
1484         }
1485
1486         return r;
1487 }
1488
1489 static int dvb_frontend_ioctl(struct file *file,
1490                         unsigned int cmd, void *parg)
1491 {
1492         struct dvb_device *dvbdev = file->private_data;
1493         struct dvb_frontend *fe = dvbdev->priv;
1494         struct dvb_frontend_private *fepriv = fe->frontend_priv;
1495         int err = -EOPNOTSUPP;
1496
1497         dprintk("%s (%d)\n", __func__, _IOC_NR(cmd));
1498
1499         if (fepriv->exit != DVB_FE_NO_EXIT)
1500                 return -ENODEV;
1501
1502         if ((file->f_flags & O_ACCMODE) == O_RDONLY &&
1503             (_IOC_DIR(cmd) != _IOC_READ || cmd == FE_GET_EVENT ||
1504              cmd == FE_DISEQC_RECV_SLAVE_REPLY))
1505                 return -EPERM;
1506
1507         if (down_interruptible (&fepriv->sem))
1508                 return -ERESTARTSYS;
1509
1510         if ((cmd == FE_SET_PROPERTY) || (cmd == FE_GET_PROPERTY))
1511                 err = dvb_frontend_ioctl_properties(file, cmd, parg);
1512         else {
1513                 fe->dtv_property_cache.state = DTV_UNDEFINED;
1514                 err = dvb_frontend_ioctl_legacy(file, cmd, parg);
1515         }
1516
1517         up(&fepriv->sem);
1518         return err;
1519 }
1520
1521 static int dvb_frontend_ioctl_properties(struct file *file,
1522                         unsigned int cmd, void *parg)
1523 {
1524         struct dvb_device *dvbdev = file->private_data;
1525         struct dvb_frontend *fe = dvbdev->priv;
1526         int err = 0;
1527
1528         struct dtv_properties *tvps = NULL;
1529         struct dtv_property *tvp = NULL;
1530         int i;
1531
1532         dprintk("%s\n", __func__);
1533
1534         if(cmd == FE_SET_PROPERTY) {
1535                 tvps = (struct dtv_properties __user *)parg;
1536
1537                 dprintk("%s() properties.num = %d\n", __func__, tvps->num);
1538                 dprintk("%s() properties.props = %p\n", __func__, tvps->props);
1539
1540                 /* Put an arbitrary limit on the number of messages that can
1541                  * be sent at once */
1542                 if ((tvps->num == 0) || (tvps->num > DTV_IOCTL_MAX_MSGS))
1543                         return -EINVAL;
1544
1545                 tvp = kmalloc(tvps->num * sizeof(struct dtv_property), GFP_KERNEL);
1546                 if (!tvp) {
1547                         err = -ENOMEM;
1548                         goto out;
1549                 }
1550
1551                 if (copy_from_user(tvp, tvps->props, tvps->num * sizeof(struct dtv_property))) {
1552                         err = -EFAULT;
1553                         goto out;
1554                 }
1555
1556                 for (i = 0; i < tvps->num; i++) {
1557                         (tvp + i)->result = dtv_property_process_set(fe, tvp + i, file);
1558                         err |= (tvp + i)->result;
1559                 }
1560
1561                 if(fe->dtv_property_cache.state == DTV_TUNE)
1562                         dprintk("%s() Property cache is full, tuning\n", __func__);
1563
1564         } else
1565         if(cmd == FE_GET_PROPERTY) {
1566
1567                 tvps = (struct dtv_properties __user *)parg;
1568
1569                 dprintk("%s() properties.num = %d\n", __func__, tvps->num);
1570                 dprintk("%s() properties.props = %p\n", __func__, tvps->props);
1571
1572                 /* Put an arbitrary limit on the number of messages that can
1573                  * be sent at once */
1574                 if ((tvps->num == 0) || (tvps->num > DTV_IOCTL_MAX_MSGS))
1575                         return -EINVAL;
1576
1577                 tvp = kmalloc(tvps->num * sizeof(struct dtv_property), GFP_KERNEL);
1578                 if (!tvp) {
1579                         err = -ENOMEM;
1580                         goto out;
1581                 }
1582
1583                 if (copy_from_user(tvp, tvps->props, tvps->num * sizeof(struct dtv_property))) {
1584                         err = -EFAULT;
1585                         goto out;
1586                 }
1587
1588                 for (i = 0; i < tvps->num; i++) {
1589                         (tvp + i)->result = dtv_property_process_get(fe, tvp + i, file);
1590                         err |= (tvp + i)->result;
1591                 }
1592
1593                 if (copy_to_user(tvps->props, tvp, tvps->num * sizeof(struct dtv_property))) {
1594                         err = -EFAULT;
1595                         goto out;
1596                 }
1597
1598         } else
1599                 err = -EOPNOTSUPP;
1600
1601 out:
1602         kfree(tvp);
1603         return err;
1604 }
1605
1606 static int dvb_frontend_ioctl_legacy(struct file *file,
1607                         unsigned int cmd, void *parg)
1608 {
1609         struct dvb_device *dvbdev = file->private_data;
1610         struct dvb_frontend *fe = dvbdev->priv;
1611         struct dvb_frontend_private *fepriv = fe->frontend_priv;
1612         int cb_err, err = -EOPNOTSUPP;
1613
1614         if (fe->dvb->fe_ioctl_override) {
1615                 cb_err = fe->dvb->fe_ioctl_override(fe, cmd, parg,
1616                                                     DVB_FE_IOCTL_PRE);
1617                 if (cb_err < 0)
1618                         return cb_err;
1619                 if (cb_err > 0)
1620                         return 0;
1621                 /* fe_ioctl_override returning 0 allows
1622                  * dvb-core to continue handling the ioctl */
1623         }
1624
1625         switch (cmd) {
1626         case FE_GET_INFO: {
1627                 struct dvb_frontend_info* info = parg;
1628                 memcpy(info, &fe->ops.info, sizeof(struct dvb_frontend_info));
1629                 dvb_frontend_get_frequency_limits(fe, &info->frequency_min, &info->frequency_max);
1630
1631                 /* Force the CAN_INVERSION_AUTO bit on. If the frontend doesn't
1632                  * do it, it is done for it. */
1633                 info->caps |= FE_CAN_INVERSION_AUTO;
1634                 err = 0;
1635                 break;
1636         }
1637
1638         case FE_READ_STATUS: {
1639                 fe_status_t* status = parg;
1640
1641                 /* if retune was requested but hasn't occurred yet, prevent
1642                  * that user get signal state from previous tuning */
1643                 if (fepriv->state == FESTATE_RETUNE ||
1644                     fepriv->state == FESTATE_ERROR) {
1645                         err=0;
1646                         *status = 0;
1647                         break;
1648                 }
1649
1650                 if (fe->ops.read_status)
1651                         err = fe->ops.read_status(fe, status);
1652                 break;
1653         }
1654         case FE_READ_BER:
1655                 if (fe->ops.read_ber)
1656                         err = fe->ops.read_ber(fe, (__u32*) parg);
1657                 break;
1658
1659         case FE_READ_SIGNAL_STRENGTH:
1660                 if (fe->ops.read_signal_strength)
1661                         err = fe->ops.read_signal_strength(fe, (__u16*) parg);
1662                 break;
1663
1664         case FE_READ_SNR:
1665                 if (fe->ops.read_snr)
1666                         err = fe->ops.read_snr(fe, (__u16*) parg);
1667                 break;
1668
1669         case FE_READ_UNCORRECTED_BLOCKS:
1670                 if (fe->ops.read_ucblocks)
1671                         err = fe->ops.read_ucblocks(fe, (__u32*) parg);
1672                 break;
1673
1674
1675         case FE_DISEQC_RESET_OVERLOAD:
1676                 if (fe->ops.diseqc_reset_overload) {
1677                         err = fe->ops.diseqc_reset_overload(fe);
1678                         fepriv->state = FESTATE_DISEQC;
1679                         fepriv->status = 0;
1680                 }
1681                 break;
1682
1683         case FE_DISEQC_SEND_MASTER_CMD:
1684                 if (fe->ops.diseqc_send_master_cmd) {
1685                         err = fe->ops.diseqc_send_master_cmd(fe, (struct dvb_diseqc_master_cmd*) parg);
1686                         fepriv->state = FESTATE_DISEQC;
1687                         fepriv->status = 0;
1688                 }
1689                 break;
1690
1691         case FE_DISEQC_SEND_BURST:
1692                 if (fe->ops.diseqc_send_burst) {
1693                         err = fe->ops.diseqc_send_burst(fe, (fe_sec_mini_cmd_t) parg);
1694                         fepriv->state = FESTATE_DISEQC;
1695                         fepriv->status = 0;
1696                 }
1697                 break;
1698
1699         case FE_SET_TONE:
1700                 if (fe->ops.set_tone) {
1701                         err = fe->ops.set_tone(fe, (fe_sec_tone_mode_t) parg);
1702                         fepriv->tone = (fe_sec_tone_mode_t) parg;
1703                         fepriv->state = FESTATE_DISEQC;
1704                         fepriv->status = 0;
1705                 }
1706                 break;
1707
1708         case FE_SET_VOLTAGE:
1709                 if (fe->ops.set_voltage) {
1710                         err = fe->ops.set_voltage(fe, (fe_sec_voltage_t) parg);
1711                         fepriv->voltage = (fe_sec_voltage_t) parg;
1712                         fepriv->state = FESTATE_DISEQC;
1713                         fepriv->status = 0;
1714                 }
1715                 break;
1716
1717         case FE_DISHNETWORK_SEND_LEGACY_CMD:
1718                 if (fe->ops.dishnetwork_send_legacy_command) {
1719                         err = fe->ops.dishnetwork_send_legacy_command(fe, (unsigned long) parg);
1720                         fepriv->state = FESTATE_DISEQC;
1721                         fepriv->status = 0;
1722                 } else if (fe->ops.set_voltage) {
1723                         /*
1724                          * NOTE: This is a fallback condition.  Some frontends
1725                          * (stv0299 for instance) take longer than 8msec to
1726                          * respond to a set_voltage command.  Those switches
1727                          * need custom routines to switch properly.  For all
1728                          * other frontends, the following should work ok.
1729                          * Dish network legacy switches (as used by Dish500)
1730                          * are controlled by sending 9-bit command words
1731                          * spaced 8msec apart.
1732                          * the actual command word is switch/port dependent
1733                          * so it is up to the userspace application to send
1734                          * the right command.
1735                          * The command must always start with a '0' after
1736                          * initialization, so parg is 8 bits and does not
1737                          * include the initialization or start bit
1738                          */
1739                         unsigned long swcmd = ((unsigned long) parg) << 1;
1740                         struct timeval nexttime;
1741                         struct timeval tv[10];
1742                         int i;
1743                         u8 last = 1;
1744                         if (dvb_frontend_debug)
1745                                 printk("%s switch command: 0x%04lx\n", __func__, swcmd);
1746                         do_gettimeofday(&nexttime);
1747                         if (dvb_frontend_debug)
1748                                 memcpy(&tv[0], &nexttime, sizeof(struct timeval));
1749                         /* before sending a command, initialize by sending
1750                          * a 32ms 18V to the switch
1751                          */
1752                         fe->ops.set_voltage(fe, SEC_VOLTAGE_18);
1753                         dvb_frontend_sleep_until(&nexttime, 32000);
1754
1755                         for (i = 0; i < 9; i++) {
1756                                 if (dvb_frontend_debug)
1757                                         do_gettimeofday(&tv[i + 1]);
1758                                 if ((swcmd & 0x01) != last) {
1759                                         /* set voltage to (last ? 13V : 18V) */
1760                                         fe->ops.set_voltage(fe, (last) ? SEC_VOLTAGE_13 : SEC_VOLTAGE_18);
1761                                         last = (last) ? 0 : 1;
1762                                 }
1763                                 swcmd = swcmd >> 1;
1764                                 if (i != 8)
1765                                         dvb_frontend_sleep_until(&nexttime, 8000);
1766                         }
1767                         if (dvb_frontend_debug) {
1768                                 printk("%s(%d): switch delay (should be 32k followed by all 8k\n",
1769                                         __func__, fe->dvb->num);
1770                                 for (i = 1; i < 10; i++)
1771                                         printk("%d: %d\n", i, timeval_usec_diff(tv[i-1] , tv[i]));
1772                         }
1773                         err = 0;
1774                         fepriv->state = FESTATE_DISEQC;
1775                         fepriv->status = 0;
1776                 }
1777                 break;
1778
1779         case FE_DISEQC_RECV_SLAVE_REPLY:
1780                 if (fe->ops.diseqc_recv_slave_reply)
1781                         err = fe->ops.diseqc_recv_slave_reply(fe, (struct dvb_diseqc_slave_reply*) parg);
1782                 break;
1783
1784         case FE_ENABLE_HIGH_LNB_VOLTAGE:
1785                 if (fe->ops.enable_high_lnb_voltage)
1786                         err = fe->ops.enable_high_lnb_voltage(fe, (long) parg);
1787                 break;
1788
1789         case FE_SET_FRONTEND: {
1790                 struct dvb_frontend_tune_settings fetunesettings;
1791
1792                 if(fe->dtv_property_cache.state == DTV_TUNE) {
1793                         if (dvb_frontend_check_parameters(fe, &fepriv->parameters) < 0) {
1794                                 err = -EINVAL;
1795                                 break;
1796                         }
1797                 } else {
1798                         if (dvb_frontend_check_parameters(fe, parg) < 0) {
1799                                 err = -EINVAL;
1800                                 break;
1801                         }
1802
1803                         memcpy (&fepriv->parameters, parg,
1804                                 sizeof (struct dvb_frontend_parameters));
1805                         dtv_property_cache_sync(fe, &fepriv->parameters);
1806                 }
1807
1808                 memset(&fetunesettings, 0, sizeof(struct dvb_frontend_tune_settings));
1809                 memcpy(&fetunesettings.parameters, parg,
1810                        sizeof (struct dvb_frontend_parameters));
1811
1812                 /* force auto frequency inversion if requested */
1813                 if (dvb_force_auto_inversion) {
1814                         fepriv->parameters.inversion = INVERSION_AUTO;
1815                         fetunesettings.parameters.inversion = INVERSION_AUTO;
1816                 }
1817                 if (fe->ops.info.type == FE_OFDM) {
1818                         /* without hierarchical coding code_rate_LP is irrelevant,
1819                          * so we tolerate the otherwise invalid FEC_NONE setting */
1820                         if (fepriv->parameters.u.ofdm.hierarchy_information == HIERARCHY_NONE &&
1821                             fepriv->parameters.u.ofdm.code_rate_LP == FEC_NONE)
1822                                 fepriv->parameters.u.ofdm.code_rate_LP = FEC_AUTO;
1823                 }
1824
1825                 /* get frontend-specific tuning settings */
1826                 if (fe->ops.get_tune_settings && (fe->ops.get_tune_settings(fe, &fetunesettings) == 0)) {
1827                         fepriv->min_delay = (fetunesettings.min_delay_ms * HZ) / 1000;
1828                         fepriv->max_drift = fetunesettings.max_drift;
1829                         fepriv->step_size = fetunesettings.step_size;
1830                 } else {
1831                         /* default values */
1832                         switch(fe->ops.info.type) {
1833                         case FE_QPSK:
1834                                 fepriv->min_delay = HZ/20;
1835                                 fepriv->step_size = fepriv->parameters.u.qpsk.symbol_rate / 16000;
1836                                 fepriv->max_drift = fepriv->parameters.u.qpsk.symbol_rate / 2000;
1837                                 break;
1838
1839                         case FE_QAM:
1840                                 fepriv->min_delay = HZ/20;
1841                                 fepriv->step_size = 0; /* no zigzag */
1842                                 fepriv->max_drift = 0;
1843                                 break;
1844
1845                         case FE_OFDM:
1846                                 fepriv->min_delay = HZ/20;
1847                                 fepriv->step_size = fe->ops.info.frequency_stepsize * 2;
1848                                 fepriv->max_drift = (fe->ops.info.frequency_stepsize * 2) + 1;
1849                                 break;
1850                         case FE_ATSC:
1851                                 fepriv->min_delay = HZ/20;
1852                                 fepriv->step_size = 0;
1853                                 fepriv->max_drift = 0;
1854                                 break;
1855                         }
1856                 }
1857                 if (dvb_override_tune_delay > 0)
1858                         fepriv->min_delay = (dvb_override_tune_delay * HZ) / 1000;
1859
1860                 fepriv->state = FESTATE_RETUNE;
1861
1862                 /* Request the search algorithm to search */
1863                 fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN;
1864
1865                 dvb_frontend_wakeup(fe);
1866                 dvb_frontend_add_event(fe, 0);
1867                 fepriv->status = 0;
1868                 err = 0;
1869                 break;
1870         }
1871
1872         case FE_GET_EVENT:
1873                 err = dvb_frontend_get_event (fe, parg, file->f_flags);
1874                 break;
1875
1876         case FE_GET_FRONTEND:
1877                 if (fe->ops.get_frontend) {
1878                         memcpy (parg, &fepriv->parameters, sizeof (struct dvb_frontend_parameters));
1879                         err = fe->ops.get_frontend(fe, (struct dvb_frontend_parameters*) parg);
1880                 }
1881                 break;
1882
1883         case FE_SET_FRONTEND_TUNE_MODE:
1884                 fepriv->tune_mode_flags = (unsigned long) parg;
1885                 err = 0;
1886                 break;
1887         };
1888
1889         if (fe->dvb->fe_ioctl_override) {
1890                 cb_err = fe->dvb->fe_ioctl_override(fe, cmd, parg,
1891                                                     DVB_FE_IOCTL_POST);
1892                 if (cb_err < 0)
1893                         return cb_err;
1894         }
1895
1896         return err;
1897 }
1898
1899
1900 static unsigned int dvb_frontend_poll(struct file *file, struct poll_table_struct *wait)
1901 {
1902         struct dvb_device *dvbdev = file->private_data;
1903         struct dvb_frontend *fe = dvbdev->priv;
1904         struct dvb_frontend_private *fepriv = fe->frontend_priv;
1905
1906         dprintk ("%s\n", __func__);
1907
1908         poll_wait (file, &fepriv->events.wait_queue, wait);
1909
1910         if (fepriv->events.eventw != fepriv->events.eventr)
1911                 return (POLLIN | POLLRDNORM | POLLPRI);
1912
1913         return 0;
1914 }
1915
1916 static int dvb_frontend_open(struct inode *inode, struct file *file)
1917 {
1918         struct dvb_device *dvbdev = file->private_data;
1919         struct dvb_frontend *fe = dvbdev->priv;
1920         struct dvb_frontend_private *fepriv = fe->frontend_priv;
1921         struct dvb_adapter *adapter = fe->dvb;
1922         int ret;
1923
1924         dprintk ("%s\n", __func__);
1925         if (fepriv->exit == DVB_FE_DEVICE_REMOVED)
1926                 return -ENODEV;
1927
1928         if (adapter->mfe_shared) {
1929                 mutex_lock (&adapter->mfe_lock);
1930
1931                 if (adapter->mfe_dvbdev == NULL)
1932                         adapter->mfe_dvbdev = dvbdev;
1933
1934                 else if (adapter->mfe_dvbdev != dvbdev) {
1935                         struct dvb_device
1936                                 *mfedev = adapter->mfe_dvbdev;
1937                         struct dvb_frontend
1938                                 *mfe = mfedev->priv;
1939                         struct dvb_frontend_private
1940                                 *mfepriv = mfe->frontend_priv;
1941                         int mferetry = (dvb_mfe_wait_time << 1);
1942
1943                         mutex_unlock (&adapter->mfe_lock);
1944                         while (mferetry-- && (mfedev->users != -1 ||
1945                                         mfepriv->thread != NULL)) {
1946                                 if(msleep_interruptible(500)) {
1947                                         if(signal_pending(current))
1948                                                 return -EINTR;
1949                                 }
1950                         }
1951
1952                         mutex_lock (&adapter->mfe_lock);
1953                         if(adapter->mfe_dvbdev != dvbdev) {
1954                                 mfedev = adapter->mfe_dvbdev;
1955                                 mfe = mfedev->priv;
1956                                 mfepriv = mfe->frontend_priv;
1957                                 if (mfedev->users != -1 ||
1958                                                 mfepriv->thread != NULL) {
1959                                         mutex_unlock (&adapter->mfe_lock);
1960                                         return -EBUSY;
1961                                 }
1962                                 adapter->mfe_dvbdev = dvbdev;
1963                         }
1964                 }
1965         }
1966
1967         if (dvbdev->users == -1 && fe->ops.ts_bus_ctrl) {
1968                 if ((ret = fe->ops.ts_bus_ctrl(fe, 1)) < 0)
1969                         goto err0;
1970         }
1971
1972         if ((ret = dvb_generic_open (inode, file)) < 0)
1973                 goto err1;
1974
1975         if ((file->f_flags & O_ACCMODE) != O_RDONLY) {
1976                 /* normal tune mode when opened R/W */
1977                 fepriv->tune_mode_flags &= ~FE_TUNE_MODE_ONESHOT;
1978                 fepriv->tone = -1;
1979                 fepriv->voltage = -1;
1980
1981                 ret = dvb_frontend_start (fe);
1982                 if (ret)
1983                         goto err2;
1984
1985                 /*  empty event queue */
1986                 fepriv->events.eventr = fepriv->events.eventw = 0;
1987         }
1988
1989         if (adapter->mfe_shared)
1990                 mutex_unlock (&adapter->mfe_lock);
1991         return ret;
1992
1993 err2:
1994         dvb_generic_release(inode, file);
1995 err1:
1996         if (dvbdev->users == -1 && fe->ops.ts_bus_ctrl)
1997                 fe->ops.ts_bus_ctrl(fe, 0);
1998 err0:
1999         if (adapter->mfe_shared)
2000                 mutex_unlock (&adapter->mfe_lock);
2001         return ret;
2002 }
2003
2004 static int dvb_frontend_release(struct inode *inode, struct file *file)
2005 {
2006         struct dvb_device *dvbdev = file->private_data;
2007         struct dvb_frontend *fe = dvbdev->priv;
2008         struct dvb_frontend_private *fepriv = fe->frontend_priv;
2009         int ret;
2010
2011         dprintk ("%s\n", __func__);
2012
2013         if ((file->f_flags & O_ACCMODE) != O_RDONLY)
2014                 fepriv->release_jiffies = jiffies;
2015
2016         ret = dvb_generic_release (inode, file);
2017
2018         if (dvbdev->users == -1) {
2019                 if (fepriv->exit != DVB_FE_NO_EXIT) {
2020                         fops_put(file->f_op);
2021                         file->f_op = NULL;
2022                         wake_up(&dvbdev->wait_queue);
2023                 }
2024                 if (fe->ops.ts_bus_ctrl)
2025                         fe->ops.ts_bus_ctrl(fe, 0);
2026         }
2027
2028         return ret;
2029 }
2030
2031 static const struct file_operations dvb_frontend_fops = {
2032         .owner          = THIS_MODULE,
2033         .unlocked_ioctl = dvb_generic_ioctl,
2034         .poll           = dvb_frontend_poll,
2035         .open           = dvb_frontend_open,
2036         .release        = dvb_frontend_release,
2037         .llseek         = noop_llseek,
2038 };
2039
2040 int dvb_register_frontend(struct dvb_adapter* dvb,
2041                           struct dvb_frontend* fe)
2042 {
2043         struct dvb_frontend_private *fepriv;
2044         static const struct dvb_device dvbdev_template = {
2045                 .users = ~0,
2046                 .writers = 1,
2047                 .readers = (~0)-1,
2048                 .fops = &dvb_frontend_fops,
2049                 .kernel_ioctl = dvb_frontend_ioctl
2050         };
2051
2052         dprintk ("%s\n", __func__);
2053
2054         if (mutex_lock_interruptible(&frontend_mutex))
2055                 return -ERESTARTSYS;
2056
2057         fe->frontend_priv = kzalloc(sizeof(struct dvb_frontend_private), GFP_KERNEL);
2058         if (fe->frontend_priv == NULL) {
2059                 mutex_unlock(&frontend_mutex);
2060                 return -ENOMEM;
2061         }
2062         fepriv = fe->frontend_priv;
2063
2064         sema_init(&fepriv->sem, 1);
2065         init_waitqueue_head (&fepriv->wait_queue);
2066         init_waitqueue_head (&fepriv->events.wait_queue);
2067         mutex_init(&fepriv->events.mtx);
2068         fe->dvb = dvb;
2069         fepriv->inversion = INVERSION_OFF;
2070
2071         printk ("DVB: registering adapter %i frontend %i (%s)...\n",
2072                 fe->dvb->num,
2073                 fe->id,
2074                 fe->ops.info.name);
2075
2076         dvb_register_device (fe->dvb, &fepriv->dvbdev, &dvbdev_template,
2077                              fe, DVB_DEVICE_FRONTEND);
2078
2079         mutex_unlock(&frontend_mutex);
2080         return 0;
2081 }
2082 EXPORT_SYMBOL(dvb_register_frontend);
2083
2084 int dvb_unregister_frontend(struct dvb_frontend* fe)
2085 {
2086         struct dvb_frontend_private *fepriv = fe->frontend_priv;
2087         dprintk ("%s\n", __func__);
2088
2089         mutex_lock(&frontend_mutex);
2090         dvb_frontend_stop (fe);
2091         mutex_unlock(&frontend_mutex);
2092
2093         if (fepriv->dvbdev->users < -1)
2094                 wait_event(fepriv->dvbdev->wait_queue,
2095                                 fepriv->dvbdev->users==-1);
2096
2097         mutex_lock(&frontend_mutex);
2098         dvb_unregister_device (fepriv->dvbdev);
2099
2100         /* fe is invalid now */
2101         kfree(fepriv);
2102         mutex_unlock(&frontend_mutex);
2103         return 0;
2104 }
2105 EXPORT_SYMBOL(dvb_unregister_frontend);
2106
2107 #ifdef CONFIG_MEDIA_ATTACH
2108 void dvb_frontend_detach(struct dvb_frontend* fe)
2109 {
2110         void *ptr;
2111
2112         if (fe->ops.release_sec) {
2113                 fe->ops.release_sec(fe);
2114                 symbol_put_addr(fe->ops.release_sec);
2115         }
2116         if (fe->ops.tuner_ops.release) {
2117                 fe->ops.tuner_ops.release(fe);
2118                 symbol_put_addr(fe->ops.tuner_ops.release);
2119         }
2120         if (fe->ops.analog_ops.release) {
2121                 fe->ops.analog_ops.release(fe);
2122                 symbol_put_addr(fe->ops.analog_ops.release);
2123         }
2124         ptr = (void*)fe->ops.release;
2125         if (ptr) {
2126                 fe->ops.release(fe);
2127                 symbol_put_addr(ptr);
2128         }
2129 }
2130 #else
2131 void dvb_frontend_detach(struct dvb_frontend* fe)
2132 {
2133         if (fe->ops.release_sec)
2134                 fe->ops.release_sec(fe);
2135         if (fe->ops.tuner_ops.release)
2136                 fe->ops.tuner_ops.release(fe);
2137         if (fe->ops.analog_ops.release)
2138                 fe->ops.analog_ops.release(fe);
2139         if (fe->ops.release)
2140                 fe->ops.release(fe);
2141 }
2142 #endif
2143 EXPORT_SYMBOL(dvb_frontend_detach);